I haven't had many issues with being fed at weddings. Usually the bride and groom are pushing us to eat. The one time the caterer was shitty and wouldn't feed us until after the guests ate, we just skipped it and ate afterward. But I wasn't going to get in a fight with a vendor at a wedding (especially when I'd already seen a demonstration of his volatile temper) nor would I go whine to a bride on her wedding day that the caterer wouldn't feed me. My husband/shooting partner is vegan, which just isn't something we expect people to accommodate. Occasionally there is food he can eat. Mostly we act like the other 99% of people in the work world and feed ourselves. Toffee Buzz Clif Bars are our friends.